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/sci/ - Science & Math


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8584990 No.8584990 [Reply] [Original]

Why didn't we get the fantastic future we were promised?

In 1962, it was possible for the President of the United States to stand in front of the nation and say 'we choose to go to the moon!' - and for the nation to deliver it 7 years later. At that moment, the future felt limitless.

But today, the US cannot even send a man into low earth orbit without relying on Russian technology (itself a 1960s relic), and has no capacity at all to put a man on the moon, let alone anywhere further afield.

50 years ago, people were told that by now we would be living in underwater cities, driving flying cars and having vacations on the moon - or even Mars.

Instead, when we go on vacation in 2016, we still often board Boeing 747s - a plane designed before the invention of the pocket calculator, and which first flew in 1969 - BEFORE that moon landing. We don't even have supersonic airliners anymore - which we did have in 1976.

We were promised by President Nixon in 1971 that cancer would be cured by the time of the US bicentennial. It didn't happen.

We were told we were entering the Atomic Age - that by the year 2000, a thousand nuclear reactors would be powering America. But today, the US has only 100 nuclear reactors.

What happened? Why didn't that bright future materialise?

pic related; a glimpse into some possible future

66 replies omitted. Click Reply to view.
>> No.8587292

>>8587089
>He's even created animosity between himself and the Intel community.

/sci/ is being monumentally retarded at pol yet again. When the Intel community stop making shit up about "muh Rusia hacking the election!" then you will have a more favorable relation but until then keep pushing fake news until no one believes the Intel community anymore. Seriously look at their official report then kek until your whole neighborhood hears you.

>> No.8587303

Moore's Law domain advances were not matched in fields outside of computers. Information processing is super advanced, and what we have today was simply not predicted at all in the pre-information age. Doing things in physical space is still a slow difficult process, while cyberspace continues it's advance.

Computation makes much possible in medicine, with complex simulation of shit like protein folding going a long way toward that cancer cure and curing everything else. Perhaps even immortality if we can crunch the numbers for the senescence problem or reverse engineer the brain (a hard task).

None of the behind the scenes stuff is as glamorous as flying cars and space shit, but think about technologies like MRI that can scan your body and computationally visualize it-that is pure Star Trek medicine and it has become common place.

>> No.8587319

>>8585725
this

>> No.8587331

>>8584990
>I don't understand sustainability - the post

>> No.8587331,1 [INTERNAL] 

Robot is https://www.youtube.com/watch?v=ZVDTTeYaDek



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10353965 No.10353965 [Reply] [Original]

being a brainlet has to be literally the worst pain ever, pls tell me there is a cure close to being made public /sci/

49 replies omitted. Click Reply to view.
>> No.10362830

>>10362580
That article doesn't seem to specify what dose was used. I'd image that "treatment" implies replacement therapy from a doctor, higher quantities are typically "abuse" and would never be prescribed, even in a case like yours because the physician risks their license and lawsuits. You'd have to obtain it through a drug dealer, or be a professional athlete with connections to shady physicians, at least in the country I live in.

Obviously there are risks and potential harm chronically, but if all you care about is building muscle then who cares if you get a heart attack at 50-60? In the short term, at least, 600mg/week of test e is safe. I'd start there

https://www.physiology.org/doi/full/10.1152/ajpendo.2001.281.6.E1172

Here's a calculator which can predict blood levels in response to various doses pretty accurately, it can allow you to judge how far over the normal range of testosterone you'd like to go

https://steroidcalc.com

You can find many more anecdotes of people going far over 600mg/week without ill effect and with further muscle building benefits. Google "steroid source talk" (I'd post the link directly but mods are known to ban people for it on /fit/) or http://reddit.com/r/steroids

The real immediate health harms come only from xenobiotic testosterone analogues like dianabol and trenbolone, which are hepatotoxic and can cause liver failure.

>> No.10362852

>>10361839
I lack so much info, like how long have you actually tried to gain weight, what you actually eat and how much. What exercises you do. Still, good luck with getting that second opinion I guess.

>> No.10363053

>>10354128
Please, just stop with the “books make you smarter” meme.
There is not a more pretentious group of people on this planet than book readers. Maybe vegans, but probably not.

>> No.10363053,21 [INTERNAL] 

With the rise of social media, Facebook login integration has become one of the must have features in mobile app. Despite the fact that every developer is integrating Facebook login into their apps, Facebook is doing a very poor job on updating their documentations. In fact, some of the documentations’ sample code are still written in Objective-C.

>> No.10363053,33 [INTERNAL] 

PNC Bank offers internet banking services and this has made it easy for patrons to manage their bank accounts.



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[ERROR] No.3751105 [Reply] [Last 50] [Original]

Original problem is in the pic.

You have an n episode tv series. You want to watch the episodes in every order possible. What is the least number of episodes that you would have to watch?

Over lapping is allowed. For example, in the case of n=2, watching episode 1, then 2, then 1 again, would fit the criteria.

The orders must be continuous. For example, (1,2,1,3) does NOT contain the sequence (1,2,3)

1102 replies omitted. Click Reply to view.
>> No.3752047,4956 [INTERNAL] 

Thanks for sharing the post Superslot nimo tv

>> No.3752047,4961 [INTERNAL] 

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>> No.3752047,4962 [INTERNAL] 

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>> No.3752047,4971 [INTERNAL] 

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>> No.3752047,4979 [INTERNAL] 

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File: 388 KB, 638x653, 1612271876517.png [View same] [iqdb] [saucenao] [google]
12789755 No.12789755 [Reply] [Last 50] [Original]

Scientifically speaking, how would one approach macroeconomic theory to improve society and better science?
We all know capitalism and socialism have major flaws. What are some better alternatives?
My picks (not in any order):
Feudalism
Mercantilism
Social credit
Distributism
Palace economy
IMO distributism would be best for science.

108 replies omitted. Click Reply to view.
>> No.12798162

>>12797600
The scientific method comes from Galileo. At the root it is just experimental science, before it was just speculative schizo ramblings

>> No.12798173

We badly need a /hum/ board for humanities. This is just /his/ mixed with /pol/. Where's the science & math?

>> No.12798959
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12798959

>>12798151
>Scientific method comes from Galileo
>fails to provide replicability, as he owns the sole telescope in the world
Nothing personal, kid

>> No.12799332

>>12798173
How about 5 more video game boards?

>> No.12799836

>>12798959
based epistemological anarchist



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12290432 No.12290432 [Reply] [Original]

https://www.youtube.com/watch?v=Zi_mQ0sKOfo
Was sky scholar bullshit all along and just spreading lies?

1 replies omitted. Click Reply to view.
>> No.12290443

>>12290439
well you do take a position in criticizing. such as sky scholar saying CMB actually just the measurement tools picking up radiation from the ocean.

>> No.12290461

>>12290443
Him saying that isn't a pure criticism, it's a replacement.
Institutional physics has a lot of bullshit, but so do old hucksters outside the realm too.

Either way, I can criticize something without supporting something else

>> No.12290555

>>12290432
>Professor Dave
BASED

>> No.12290982
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12290982

Yes. But that was always the case. Note that "Sky Scholar" literally deleted their last video after even they started to smell the bullshit. His claims have never made sense on even the most basic level of logic. He doesn't even understand the very basic shit he is criticising, he does not understand multipoles. But you can't ask any of these people to think.

Pic related, it's one of the many observations which completely destroy his claim. The SZ effect. Ask yourself how a distant galaxy cluster casts a shadow on light emitted by the oceans. It can't, and yet it is observed to cast a shadow on the CMB and so he is wrong. His other nonsensical claims require either negative brightness or the sky to be totally dark at radio wavelengths.

>> No.12290982,1 [INTERNAL] 

>>12290555
No.



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12100206 No.12100206 [Reply] [Last 50] [Original]

The Electric Universe wins again. This time, with their own nuclear plasma reactor. Time to rethink everything you thought you knew.

https://www.youtube.com/watch?v=7GFFfmBGb5U

116 replies omitted. Click Reply to view.
>> No.12102221

>>12101742
>>>/lgbt/

>> No.12102511
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12102511

>>12100206

This is not even funny anymore, they are just pretending to find new shit when its just already 100 year old alien tech as usual.

Fuck the US military and their 100 years ahead mentality

>> No.12102511,1 [INTERNAL] 

>>12100568
You mean from main stream science and corporations?

>> No.12102511,2 [INTERNAL] 

>>12100650
>venture capitalist bait to extract money from people with no knowledge of physics by presenting them a collection of half-truths that will never deliver on the "making money" aspect.

So basically mainstream science?

>> No.12102511,3 [INTERNAL] 

>>12100735
Will you ever question mainstream science?



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12629036 No.12629036 [Reply] [Last 50] [Original]

Is time travel possible

164 replies omitted. Click Reply to view.
>> No.12636990
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12636990

>>12632512
>>12632570
The ‘cruise ship’ hypothesis has been rebutted, mainly on the calculated elevation of the object, which is based on video fragments where the object and the moon were visible simultaneously and the moon’s position and angular size could be used as a yardstick (plus 7 additional counter arguments).
Source: http://turkeyufocase.blogspot.com/2013/02/multiple-reasons-suggest-turkey-ufo-was.html

>> No.12638336

need more time travel info

>> No.12638341

possible yes
likely no

>> No.12638341,1 [INTERNAL] 

>>12631410
He was wrong about everything else, Iraq was just a lucky coincidence.

>> No.12638341,2 [INTERNAL] 

>>12634050
You aren’t referring to PHYSICAL laws.



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12673354 No.12673354 [Reply] [Original]

Education is a misunderstood concept in the Western world. A formal education is designed to teach you as little as possible. The overwhelming deluge of information is intended to drown anyone who stops to smell the roses. Within the narrow and rushed scope of such a syllabus there is not enough time to understand all the content and process it into knowledge. Not having time to think forces you to download your ideas from others. And this is deliberate. You’re not meant to comprehend it. You’re meant to rote learn and regurgitate torrents of incoherent rubbish on command under a stop watch.

This has little to do with learning. Learning is about questions and answers, not propagating someone else’s ideas. Repeating what you’re told is not intelligence, and it’s nothing to be proud of.

Education is about learning what to think, not how to think. Schooling punishes enthusiasm and rewards obedience. It’s an exercise in compliance repeated and conditioned until you lose the ability for independent thinking. It’s about showing up and motioning through the movements without question or resistance until you are domesticated with a low resolution mind. The process is designed to keep you busy while accustoming you to the mental habits of a slave. A good education obliterates common sense and deletes instincts.

90 replies omitted. Click Reply to view.
>> No.12683977

>>12676829
>CMU req all new students to join some marxist ideological brainwashing class that forces you to protest on campus. 'Protesting is healthy.. you must denounce and shout/violently organize against supremacy!'
Do you actually go to CMU? This isn't true, unless you're talking about Central Michigan University or something.

>> No.12684279

>>12675991
can Causation happen without correlation ?

>> No.12684313

>>12677767
>I wish to achieve a post-scarcity society, where people devote themselves to a personal and collective pursuit of truth and beauty.

I share your desire for such a world.

I think it is possible, but it won't be easy to realize.

My thought on a core tenet that would help guide us to such a harmonious world is to define a goal (or Telos) for civilization. What should civilization be striving towards?

The overarching goal I've come to is that civilization should be aiming to delay the heat death of the universe for as long as possible. Note, it isn't even important if heat death is the actual end scenario of the universe. The point is that this idea would guide individual's actions to making decisions that are not deliberately wasteful of time and energy, the way we find so much of modern education, work, and I think, even research to be. It would prioritize quality over quantity, and long-term planning over short term gratification. We have the tools and technology in our hands today to make the world drastically better. It is only because we do not allow ourselves to use them that we suffer. If we can spread this vision and purpose to enough people then we can collectively bring humanity and Earth to a new age.

It won't be easy. People are stuck in their mindsets. But it's worth trying.

>> No.12684319

>>12673354
Intelligence isn't just logic, you also need to remember things. The current system has way too much focus on memorization, but that doesn't mean it should be done away with. If you are a surgeon, you should be able to remember where the appendix is.

>> No.12684319,1 [INTERNAL] 

>>12673549
>fall for the "electric universe" meme

And what make you think that is “just a meme”?



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10446972 No.10446972 [Reply] [Original]

>I have done a fair amount of original research over the past two and a half years on dicyanin, dicyanine, and dicyanine A. I have obtained and analyzed samples of dicyanine A, and the pinacyanols (iodide, bromide, chloride,) and I have recreated Kilner's liquid aura goggles. I have also successfully created epoxy based pinacyanol lenses that are moderately stable, and can be used in aura goggles. I have also created aura goggles of my own design using glass filters which emulate the Kilnescrene of Harry Boddington.

>To show you I'm not just a blowhard, I've uploaded a spreadsheet with spectra I obtained this summer of pinacyanol bromide solved in methanol and epoxy. Put up, or shut up. Instrument is a Jenway 6320 spectrophotometer.

>I am convinced that dicyanin, dicyanine, and dicyanine A are the same substance. My main evidence is from a 1924 edition (the inaugural) of the Colour Index in my possession. This book is published annually by the Society of Dyers and Colourists in the U.K., but it is quite costly. The 1924 edition is especially relevant, as Dr. Kilner published his revised edition of The Human Atmosphere [2] in 1920, so the terminology and materials would be what was extant at the time of his writing.

>In this edition is a commercial name index. In that index, Dicyanine, Dicyanine A, and Dicyanines are all listed as alternate commercial names for Dicyanine A. [3] That commercial name was owned by MLB (Farbwerke vorm. Meister, Lucius & Bruning, Hochst a./Main.,) the original manufacturer of Dicyanine A. [4]

>I believe "Dicyanin" is either an alternate commercial name for Dicyanine / Dicyanine A, or Dr. Kilner simply misspelled it. As far as I can determine, that spelling originated with him.

3 replies omitted. Click Reply to view.
>> No.10446988

>Dicyanin is a blue dye. It is not a drug. It is not physically dangerous. It is not poison. However, you cannot buy it. The chemical company that makes Dicyanin assigns a security code to its customers. To see how high Dicyanin is classified we asked a government chemist if he could order some. His security code allowed him to buy all the LSD or Heroine or Cocaine he wanted but when he requested Dicyanin Dye he was told he was not cleared high enough to obtain it.

>Why not ? Well, Dicyanin Dye has "special" properties. If you make a window using two panes of glass with Dicyanin Dye between and look into it you can see the Astral World directly. Now, if you are a psychic or meditation student, you can see the Astral World too but this dye allows ANYONE to see it. Now you see why it has a higher security rating than Heroin ! If people could buy this simple dye [freely available in the 1940's] they could prove to themselves and anyone else the existence of another Plane of reality.

>Private researchers used Dicyanin Dye before the Government locked it away in the 1940's. This gives an approximation of the time when the decisions were being made to censor all available knowledge so that new generations could be "programmed" into a belief system that was manufactured by the Government and which had no relation to true reality.

>Kirlian Photography yields images similar to Dicyanin, but it is limited because it yields still pictures as opposed to a real-time continuous view.

Have fun making your very own special Dicyanin Dye tinted glasses, /sci/!

>> No.10446988,1 [INTERNAL] 

I need some can anyone help

>> No.10446988,2 [INTERNAL] 

Please email me if you can ship me the dye. I’m willing to pay for it and I really need some.

>> No.10446988,3 [INTERNAL] 

Please i need some Too to Buy. Dicyanine. Or is There a Google on sale which al Ready have it within ?

>> No.10446988,5 [INTERNAL] 

Hi I really want to try the goggles and my Mom would love them! Would be the best birthday gift ever for her. Please email me if you can hook me up she loves that kind of stuff.



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12720650 No.12720650 [Reply] [Original]

Several years ago, Gallup published a poll showing an increase in LGBT population over time. In what can only be describes as an alarming rate of growth, I'm absolutely shocked that these social scientists haven't correctly modeled this phenomenon. I've taken the liberty of plotting the data, with three projections in place.

In the blue curve, you'll see that if we do not act NOW, that by 2070, nearly all humans will be gay. This means that your grandchildren will likely be the last generation to walk this Earth, as gay people do not sexually reproduce.

Next, you'll see in the orange curve moderate policies. We can curb the growth, for now, in the hopes we can act more aggressively later. Again, this is not ideal as by the year 2070, we'll still have over 80% of the population being gay. This means your grandchild will probably be gay, but there will be some lucky folks among us who can be great grandparents. Unfortunately, even with moderate policies in place, children born by 2100 will likely be the last population to walk this Earth.

Lastly, we see in the gray curve that if we aggressively stop all pro-LGBT funding, we still cannot stop the growth. It appears this growth is irreversible. However, by aggressively acting now, we can reduce their population to about 15% by the year 2070, meaning that society can still function. However, by the year 2500 we may still have problems. But that's a problem that cannot be fixed by the current generations, and we have to hope there remain solutions in the future.

We must act NOW.

4 replies omitted. Click Reply to view.
>> No.12720736

>>12720650
Marketing behavior as an identity if very effective. What is there to model? People MODEL themselves based on their environment. Being "part" of perceived large in-groups is well understood.
Maybe all people wanted was to make a practice acceptable, but what they have done is promoted it as the model lifestyle. One that is not sustainable by a species that relies on reproduction processes.

>> No.12720742

>>12720721
People are driven by socio-economic pressures. You are rewarded by a large chunk of promoted society by being LGBT.

>> No.12720854

>>12720736

Yes being exclusively heterosexual is now seen as a defect, like being a sexual conservative. Young people want to label themselves as anything but straight. Females in particular are claiming to be bisexual at rates of 20%. There is no real evidence of a decline in heterosexual behavior and even if there were nature would correct for this by weeding out the genes of individuals who have less heterosexual sex.

>> No.12725221

bump

>> No.12727112

schizo thread



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12718253 No.12718253 [Reply] [Original]

Who was the brightest person that you've meet personally, bros?

62 replies omitted. Click Reply to view.
>> No.12730666

>>12730637
No one uses numbers as a memorization aid for words because numbers are hard to memorize. People use words as memorization aids for numbers. Look at all the people who memorize thousands of digits of pi and they all use some sort of mnemonic. You can't debate the validity because you were a stupid 10th grader falling for your friends
>a beautiful life
larp. Honestly think about whether if it's actually possible to convert a poem into numbers to memorize or if your friend was just larping as a schizo pseudo genius.

>> No.12730685

>>12730666
i'm done talking about this, the dude was a literal Putnam fellow and represented the US for the IMO - yup totally just larping. Fuck off and believe what you want , stop being so cancerous. This is why i was hesitant to even post this shit on here.

>> No.12730783

>>12730685
I'm not saying the dude wasn't smart. I'm saying that
>its all numbers to me
is larping as a fake schizo genius. Kids act like that in high school when they're edgy so I'm not blaming you for buying into it at the time. But you should know by now that some of that a beautiful mind level autism is bullshit.

>> No.12730807

>>12730783
Just he wasnt the type to overtly brag, he really did everything for himself and himself only. Like i just dont know what he would gain from pretending like that only infront of a handful of people.

And yeah ill agree, the beautiful mind turbo autism is complete bullshit Hollywood spins on John Nash's life. With that being the only instance of such a flex towards me , and to then go on and have the whole poem memorized for the class. I just find it hard to believe he chose that moment in time to LARP a turbo genius schizo. You know ?

>> No.12730881

>>12727664
Well for starters, his vocabulary was varied, and chock full nuanced, descriptive, less frequent words. So he had great word wealth. It wasn't just using fancy words though.
He understood the subtle concepts and semantics, which says more about his thinking than his command of language, but he also spoke succinctly, had the gift of gab, though he was actually a bit reserved, and could easily carry on a dialogue or keep up with a rapid fire exchange of ideas.
His conversations were an exchange, and he could easily answer questions while asking questions back in discourse.
Plus he had that look in his eye. The one where you can see the person calculating behind the eyes. You can see them sizing you up and whether you measure up to their standard or level.



File: 3.12 MB, 3500x3500, Facebookian Math over 9000.jpg [View same] [iqdb] [saucenao] [google]
8519414 No.8519414 [Reply] [Original]

you get these shit-tier posts go viral all the time on the shit-tier social networking websites, how about you try and make proper ones

bonus points if they look easy but are actually long and tedious to solve

84 replies omitted. Click Reply to view.
>> No.8527323

>>8526239
boi he did it

>> No.8527337

>>8526239
no mostraste como resolver la integral. sos un puto

>> No.8527938
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8527938

>>8526239
"now we solve the integral"

>> No.8529836

don't die just yet

>> No.8529836,1 [INTERNAL] 

Are you the author of that image? If not, where did you get it from?



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12660967 No.12660967 [Reply] [Last 50] [Original]

SN9 aftermath edition.

Previous thread: >>12657557

615 replies omitted. Click Reply to view.
>> No.12664205

>>12664026
>>12664000
Because spacex has more protections than US companies and the US military.
>so because Toyota makes excellent vehicles, that means Mitsubishi is credited with the same engineering competence?
Listen chink you don't understand, spacex is not in direct competition with NASA they are working together and in some cases working towards the same goals. The starship being developed will help the artemis missions speed up their timeline and the artemis contracts are paying for the R&D SpaceX requires for starship. Together they reach their goals faster and beat the soulless communist insects to colonization.
>real world don't work like that.
musc has 3yrs to get his engineering PERFECT, only one stuff up and that entire payload is lost.
Your ESL is showing. But let me be more clear on my point. SpaceX is making steady progress on starship and is not showing any real speedbumps in their development. The 3 1/2 years ago they were still trying to finish polishing falcon 9 and were figuring out falcon heavy. You think in that amount of time starship won't be ready for an unmanned trip to mars? You are delusional.

>> No.12664270

>>12664205
>Because spacex has more protections than US companies and the US military.
lmao utter bullshit.
>Listen chink you don't understand, spacex is not in direct competition with NASA they are working together and in some cases working towards the same goals. The starship being developed will help the artemis missions speed up their timeline and the artemis contracts are paying for the R&D SpaceX requires for starship. Together they reach their goals faster and beat the soulless communist insects to colonization.
NASA is advising them like you would someone you're not about to share everything with.
NASA engineers are not the ones designing it nor constructing it.
If NASA was doing all this instead of spacex, they'd already be most way done.
the engineers and technicians of NASA aren't the ones doing the work, their skills aren't being utilized at all.
the half-ass engineers and technicians of spacex makes shit that blows up and crashes.
you've clearly never been part of research and development team that actually designs and makes a thing from cradle to grave.
>Your ESL is showing. But let me be more clear on my point. SpaceX is making steady progress on starship and is not showing any real speedbumps in their development. The 3 1/2 years ago they were still trying to finish polishing falcon 9 and were figuring out falcon heavy. You think in that amount of time starship won't be ready for an unmanned trip to mars?
no
>You are delusional.
nope

you live in a fantasy world where you actually think its the engineers and technicians of NASA doing all this.
it isn't.

you don't understand the difference because you've never been involved in such a thing yourself.
you less than chink and an embarrassment to burgers.

>> No.12664439

>>12664270
>lmao utter bullshit.
It does, anything dealing with ballistic missiles is going to be far more protected by the us government than standard military branches and private corporations.
>NASA is advising them like you would someone you're not about to share everything with.
They do not plan to share everything
>NASA engineers are not the ones designing it nor constructing it.
Irrelevant
>If NASA was doing all this instead of spacex, they'd already be most way done.
How long did it take the SLS? Oh yeah over a decade and counting
>no
Good argument, so compelling
>you live in a fantasy world where you actually think its the engineers and technicians of NASA doing all this.
it isn't.
Good strawman too bad I've never asserted this. Maybe work on your English a bit more before you shill
>you don't understand the difference because you've never been involved in such a thing yourself.
you less than chink and an embarrassment to burgers.
Again work on your English. Why don't you tell me about your country's space program. Oh wait you can't.

>> No.12664476

>>12664439
START:
they made a thing and it blew up
then..
they made a thing and it blew up
then..
they made a thing and it blew up
then..
they made a thing and it blew up
then..
they made a thing and it blew up
then..
goto START:
you are a hack and couldn't engineer a paper bag.
the half ass incompetency you accept as normal development is testimony to your worthlessness

what you consider difficult is a joke.
I seriously doubt if you've been involved with state of the art in your life.

>> No.12664490

>page 10
Someone should make a new thread



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12605538 No.12605538 [Reply] [Last 50] [Original]

think outside the box edition
previous thread: >>12588999

323 replies omitted. Click Reply to view.
>> No.12618873

>>12618854
>videos
Y I K E S
read a book brainlet

>> No.12618909

>>12618873
Most books are pretty bad too desu.
I have a better proof than anywhere I've seen that also allows for generalization.
You can derive the bernoulli polynomials/numbers and the summation formula with remainder in less than a page using very basic principles/motivations.
It only requires simple integration by parts, with the motivation of telescoping series.
The bernoulli polynomials/numbers fall out effortlessly.

>> No.12618927 [DELETED] 

>>12618863
OP here, maybe I can use x^1000 + y^1000 = 2 as the equation.

>> No.12619144

>>12618909
I'll share it. I think people will appreciate the simplicity and hopefully make use of the idea.
First natural thing to do: keep repeating integration by parts on the integral of 1*f.

[math]\int\limits_{0}^{1}1*f(x)dx = \int\limits_{0}^{1}p_{0}(x)*f(x)dx \\
= \sum\limits_{m=0}^{M-1}(-1)^{m+1}[p_{m+1}(x)*f^{(m)}(x)]_{0}^{1}+ (-1)^M\int\limits_{0}^{1}p_{M}(x)*f^{(M)}(x)dx \\
where\ \ p'_{m+1}=p_{m}. [/math]

Ignoring the error and letting M = infinity gives you infinitely many constants of integration (one for each p_m, m>0) to freely choose.
What would be a "convenient" choice for all of them?
Wouldn't it be awesome if they were chosen so that if the formula was applied to [0,1] and added to the formula applied to [1,2] then there would be maximal cancellation for all derivatives of f at 1? (Telescoping)

[math]Let\ P(x,t)= \sum\limits_{m=0}^{\infty}t^mp_m(x).\\
P(x,0)=1\ and\ P_x=tP\ so\ P(x,t)=k(t)e^{xt}\ where\ k(0)=1.\\
Telescoping\ at\ all\ derivatives\ of\ f\ would\ mean\ P(1,t)-P(0,t)=0.\\
This\ can't\ happen\ since\ p_1(1)-p_1(0)=1\ no\ matter\ which\ constant\ of\ integration\ is\ chosen.\\
The\ best\ that\ can\ be\ done\ is\ P(1,t)-P(0,t)=t.\\
So\ k(t)*(e^t-1)=t,\ resulting\ in\ k(t)={t \over e^t-1}\ and\ P={te^{xt} \over e^t-1}.[/math]

The euler maclaurin summation formula and the generating function for bernoulli polynomials/numbers are obvious from here.

I'll let you derive the "midpoint" method which has a much better error term.
The trick for the midpoint method is to break [0,1] in half and use two alternating methods for the interval [0,1/2].
P1 = k1(t)e^(xt) and P2 = k2(t)e^(xt).
P1(1/2,t)-P2(0,t) = t and P2(1/2,t) - P1(0,t) = 0.

>> No.12619169

>>12619163
>>12619163

Please... Its cold...



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7906977 No.7906977 [Reply] [Original]

What does /sci/ think of Dentistry?

26 replies omitted. Click Reply to view.
>> No.7909395

(C-) level students from middle class families become dentists. Generally speaking, they suck.

Just had my biannual cleaning last week. Dentist started the polishing brush and it cut the fuck up out of my mouth because he was using dated technology... needless to say now I have 4 gaping sores in my mouth were he botch his shit by have his inept tools pinch me.

>> No.7909449

>>7906977
>What does /sci/ think of Dentistry?

Well, I sure could use a dentist right now--my tooth is killing me.

>> No.7909629

>>7906977
>You're gonna sit in a chair while we drill holes in your face.
>Then you'll pay us.

>> No.7909645

>>7909629
Do you want to look like a redneck? Having your teeth drop off one by one before you're even 18

>> No.7909645,1 [INTERNAL] 

In childhood, everyone dreamed of becoming astronauts, I dreamed of becoming a dentist because my father constantly cursed that he paid them too much



>> No.10368975

*crack*
well that’s why i never had a facebook
*sip*

>> No.10369045
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10369045

>>10368965
>Using less social media than you normally would leads to significant decreases in both depression and loneliness.

and that's why i don't like the world depression anymore. i thought depression was used to describe sadness that could possibly only be cured by medication. now it's used to describe any kind of sadness.
but if you dare to suggest a depressive person that maybe it's their fault everyone will tell you that's not how it works.
what's the catch her? can depression be cured by life style changes or not?

>> No.10369205

>>10369045
>can depression be cured by life style changes or not?
Considering social media doesn't exist not so long ago and people aren't that depressive about a shit post

>> No.10369235

>>10369045
>can depression be cured by life style changes or not?
Yes, you fucking moron.

>> No.10369235,2 [INTERNAL] 

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9605209 No.9605209 [Reply] [Original]

Solve this /sci/.

71 replies omitted. Click Reply to view.
>> No.9607219

>>9606445
do you even know the answer to d)?

seeing how many elements they gave for that set, the answer must require all of them so it would take way too long to figure it out

>> No.9607409

>>9605209
Picture is too blurry.

>> No.9607719

> 3 blue triangles
> 3 yellow triangles
> 2 black triangles

> 3 black vertical bars
> 3 yellow vertical bars
> 2 blue vertical bars

> 3 black horizontal bars
> 3 blue horizontal bars
> 2 yellow horizontal bars

hmm I wonder which one it is. You can solve without even knowing what the colors are doing. Although if you're curious look at the diagonals going up and right.

>> No.9607719,1 [INTERNAL] 

You think you're so smart, boy? Try these
d)15 124 115 14 121 119, 51 161 191 91 121 151 ?
15+124+115=14+121+119=254
51+161+191=403 91+121+151=363 so maybe ? is 40
But all sequences is 2digit+3digit+3diget and
last one will now be 2+3+3+2digit so maybe 40 is not the right answer.

>> No.9607719,2 [INTERNAL] 

Do you have a solution and maybe a explanation of following?
21/311 30/3000 19/109 35/?
Please help me



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9839476 No.9839476 [Reply] [Original]

Given that a portable electric generator and a oil power plant that supplies the grid runs on the same kind of fuel (oil), why does electricity from the generator cost 5 times more ($0.64 per kWh vs. $0.12 per kWh)?

>> No.9839487

>>9839476
Efficiency. Bigger powerplants can be made more efficient.

>> No.9839627

>>9839476
I reckon the big power plant runs hotter and burns the fuel more completely, and less of the energy escapes.

>> No.9841031
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9841031

>>9839476
holy shit
>I dont know what thermodynamics is the post
Please be bait

>> No.9841031,1 [INTERNAL] 

Which one do you recommend for camping?



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10706337 No.10706337[DELETED]  [Reply] [Original]

What are the long-term effects of circumcision?

46 replies omitted. Click Reply to view.
>> No.10707989

>>10707537
Wash your penis.

>> No.10708016

>>10706337
you become a normie because you dont have phimosis so you can have sex
t. sad phimosis owner

>> No.10708042
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10708042

>>10706401

bait

this whole thread is cut-cuck cope.

>> No.10708058

>>10708042
Every thread about this stone age mutilation practice is always full of cope. These pathetic people just can't admit they have had their most precious organ ruined at day one because of muh religion or because Dr Goldstein told them it was beneficial and they will carry the disgusting practice on and mutilating their children (assuming they manage to reproduce lel).

>> No.10708058,2 [INTERNAL] 

>>10708058,1
I think this is one of the most useful comments...



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6231764 No.6231764 [Reply] [Original]

Computer Science vs Computer Systems Engineering major

Which is best?

2 replies omitted. Click Reply to view.
>> No.6231793

>>6231778
I honestly don't know how the market is in England, but here's what I can tell you about the US:

Programmers are in high demand, and pretty much any company outside of web or mobile app development expects you to have a degree in CS to get your foot in the door. Still, computer engineers that prove their coding abilities are still equally employable, especially in embedded systems. Having a portfolio of projects significantly improves your status when trying to get work. EE guys who can prove they know how to program is also a big help.

In the States, there's a big stigma that if you don't have a CS degree, you can't program. You can't really blame them either. Everybody who's been to w3c schools seems to think they are God's gift to programming and apply for jobs they are nowhere near qualified for. As a result the over saturated market of the under qualified but high demand of programmers has a made it more difficult for those truly qualified to pierce the employment veil.

>> No.6231800

>>6231793
Awesome thanks for the info. So many conflicting sources on the internet, everything from "You will be unemployed for 5 years then end up working at Geek squad" to "You will have 10 job offers before you graduate"

>> No.6231805

>>6231800
I guess I didn't answer your other question. Really because I don't know for sure. I think I'm making this whole thing sound worse than it is. Being in CS, CE or EE is all equally very good positions to be in. You won't have to worry about getting a job. It's more like you're fighting for that one single job other skilled people are trying to get. You will definitely get job offers regardless, don't worry about that, just make yourself known to potential employers.

>> No.6231809

>>6231805
Well that sounds good to me

I'm not in it for the money anyway but if I end up making a good amount that's great. I just want enough for me and my girlfriend to not starve in the future so I think I'm in luck

>> No.6231809,1 [INTERNAL] 

You should read about it. Try to find some friends who work there and ask them about salaries and work conditions. As for me, computer science is more perspective and there are a lot of places to get hired.